𝒞𝒽𝑜𝑜𝓈𝑒 𝓉𝒽𝑒 𝒸𝑜𝓇𝓇𝑒𝒸𝓉 𝑜𝓅𝓉𝒾𝑜𝓃.
I asked Fred, "Why didn't you answer my email?"
I asked Fred why he hadn't answered my email.
I asked Fred why he didn't answer my email.
I asked Fred why you hadn't answered my email.